Automatic locking and unlocking device



(No Model.) 2 Sheets.-Sl1eet 1. H. F. GRANDALL. AUTOMATIC LOCKING ANDUNLOUKING DEVIGB.

No. 566,844. Patented Sept. 1; 1896.

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(No Model.) 2 Sheets-Sheet 2. H. F. ORANDALL. AUTOMATIC LOGKING ANDUNLOGKING DEVICE.

No. 566,844. Patented Sept. 1, 1896.

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UNITED STATES PATENT OEEIcE.

HENRY F. GRANDALL, OF MILIVAUKEE, WISOON SIN, ASSIGNOR TO THE MILWAUKEEHARVESTER COMPANY, OF WISCONSIN.

AUTOMATIC LOCKING AND UNLOCKING DEVICE.

SPECIFICATION forming part of Letters Patent No. 566,844, datedSeptember 1, 1896.

Application filed September 30, 1895- Serial No. 564,108. (No model.)

To all whom it may concern.-

Be it known that I, HENRY F. CRANDALL, of Milwaukeefin the county ofMilwaukee and State of Wisconsin, have invented certain new and usefulImprovements in" Automatic Locking and Unlocking Devices; and I dohereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it pertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

My invention relates to machines or other structures comprisingtwomembers one or both of which is movable parallel with the other inopposite directions, such, for instance, as a window sash and frame oran adjustable grain-hinder and a relatively fixed part of the machine.Its main objects are to automatically lock one member to the other inany desired position and to disengage the locking device by the powerapplied to move one member in either direction.

It consists, essentially, of a notched plate or bar or a rack formedwith or attached to one member and a locking-dog held normally inengagement with said rack by aspring and formed or provided on oppositesides with bearings, which are loosely held and seated in the othermember, and of certain novel features in the construction andarrangement of component parts of the device, as hereinafterparticularly described, and pointed out in the claims.

In the accompanying drawings like letters designate the same parts inthe several figures.

Figure 1 is a front elevation or plan view of my improved device. Fig. 2is a cross-section thereof, on an enlarged scale, on the line 2 2,Fig. 1. Fig. 3 is an enlarged plan view or elevation of the main partsof the device, a portion of one member being broken away; and Figs. 4and 5 are detail views on a still larger scale of the locking-dog, Fig.4 being an inverted plan view and Fig. 5 an end elevation.

* I have shown the device as specially adapted to a harvester foradjusting the grainbinder to operate on grain of difierent lengths; butI do not wish to be understood as limiting myself to this specificapplication of the invention, as it is suitable for other uses, as abovestated.

Referring to Figs. 1 and 3, A designates one member of the lockingdevice, which in this case is attached to a fixed part of the harvester,such as the frame B of the wind board.

or shield over the binder-deck. It is formed or provided with a rack ornotches or, a and an overhanging flange a, as shown most clearly in Fig.2.

O designates the other member of the looking device, consisting of arecessed head or housing attached, in the present instance, to a part,as D, of the adjustable binder-frame, a dog E, and a spring F. ThedogEisformed on the under side with a tooth or lug and with pivot orfulcrum bearings c e, which are loosely seated in said head or housingapproximately in a line parallel with the rack or notches a. The springF bears at one end against the tooth or lug a, being held in place by astud c and at the other end against the opposite side of said head orhousing, which is also formed with a stud c to hold it in place. Thisspring normally holds the dog in the position in which it is shown inthe drawings, with its tooth e in engagement with one of the notches inmember A. The dog is held in place in the head or housing by a cap-plateor cover 0. The head or housing containing the dog is formed or providedon the under side with a tongue or flange c and a frictionroller 0 whichengage opposite sides of the overhanging flange a on member A, andthereby guide and hold said head or housing in the proper relationthereto.

G is a lever fulcrumed to the frame B, or any suitable support having afixed relation to member A. It is connected by rod g with the dog E,said rod being hooked into a hole 6 in said dog opposite the lug e, andout of line with the pivot or fulcrum bearings 6. An overhangingprojection 0 formed on the cover 0, serves as a keeper to hold the rod din engagement with said dog.

The device operates as follows: To shift member 0 to the left into theposition indicated by dotted lines in Fig. 1, lever G is thrown to theright, as indicated by dotted lines in the same figure. The initialmovement of said lever first tilts the dog upon its pivot-bearing e tothe left, as indicated by dotted lines in Fig. 3, thereby withdrawingthe tooth or lug e from engagement with the rack or a notch a of memberA, leaving member 0 free to move upon member A. The further movement oflever G shifts said member 0 upon and parallel with member A, and whenit reaches the desired position the lever is released, leaving dog Esubject to the action of spring F, which thrusts it toward member A,forcing the tooth 6 into engagement with rack a. To shift member 0 inthe opposite direction, lever G is swung to the left, its initialmovement operating to turn the dog E on its pivot or fulcrum bearing 6farthest therefrom, and to thus disengage its tooth e from the rack a,as above explained, whereupon the further movement of lever G to theleft operates to move member 0 upon and parallel with member A to theright into any desired position, and upon the release of,

said lever the spring F operates, as before stated, to throw the tooth eof the dog into engagement with the rack or a notch in the other member.

Various changes in the details of construction and arrangement of parts,particularly of the connections for operating the dog and shifting onemember of the locking device upon the other, may be made in adapting myimprovements to the various uses to which they are applicable withoutdeparting from the spirit and intended scope of my invention.

In some applications of the device, as, for instance, to a window sashand frame, the lever G may be dispensed with, the part 0 being appliedto the sash and the dog E being provided with a handle for turning it oneither of its fulcrums out of engagement with the rack or notches in theframe, and for raising and lowering the sash.

I claim- 1. An automatic locking and unlocking device consisting of twomembers, one of which has a rack or notches, a dog adapted to engagewith said rack or notches and having oppositely-projecting pivot orfulcrum bearings loosely seated and held in the other member, which ismovable relatively to the other, and a connection or handle for turningsaid dog on either of its fulcrum-bearings out of engagement with saidrack or notches and shifting the movable member in either direction,substantially as and for the purposes set forth.

2. An automatic locking and unlocking device comprising two members, oneformed or provided with a rack or notches, and the other consisting of arecessed head or'housing, a

dog having two pivot-bearings loosely seated and held in said head orhousing and an intermediate tooth or lug, a spring holding said tooth orlug normally in engagement with the rack or notches of the other member,and a lever fulcrumed to one member and connected with the dog on theother member, one member being movable relatively to the other, substantially as and for the purposes set forth.

3. An automatic locking and unlocking device comprising two members, oneformed or provided with a rack or notches, and the other movableparallel therewith and consisting of a recessed head or housing, a doghaving two pivot or fulcrum bearings loosely held and seated in saidhead or housing, and an intermediate tooth or lug, a spring tending tohold said tooth or lug in engagement with said rack or notches, and anoperating connection with said dog out of line with its bearings,adapted by its initial movement in either direction to disengage saidtooth from said rack by turning the dog on one of its bearings and byits further movement to shift the dog and its connections upon the othermember, substantially as and for the purposes set forth.

4. An automatic locking and unlocking device comprising two membersmovable one in or on and parallel with the other and formed or providedwith guiding connections whereby they are held in proper relation toeach other, one member being formed or provided with a rack or notchesand the other having a dog loosely mounted therein and provided with anoperating connection or handle and on opposite sides with pivot orfulcrum bearings, on either of which it is adapted to be turned out ofengagement with the rack on the other member, substantially as and forthe purposes set forth.

5. The combination with a mechanical device comprising two members, oneof which is adjustable parallel with the other, of an automatic lockingand unlocking device comprising a rack or notches applied to one member,a dog carried by the other member and having on opposite sides thereoffulcrum or pivot bearings, upon either of which it is adapted to beturned out of engagement with the other member, a lever fulcrumed to asupport, having a fixed relation to the member provided with the rackand connected by a rod with said dog at a point out of line with itspivot or fulcrum bearings, substantially as and for the purposes setforth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

HENRY F. ORANDALL.

Witnesses:

' OHAs. L. Goss, R. G. LIVESAY.

